fix retagger

.github/workflows/docker-retag.yml

@@ -9,9 +9,11 @@ jobs:
   tag-docker-image:
     permissions: write-all
     runs-on: ubuntu-latest
-    env:
-      image_of_commit: $image_base:${{ steps.commit.outputs.short }}
+
     steps:
+      - id: commit
+        uses: prompt/actions-commit-hash@v3
+
       - name: Docker Login
         uses: docker/[email protected]
         with:
@@ -20,6 +22,8 @@ jobs:
           password: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Checks if docker image is on registry
+        env:
+          image_of_commit: $image_base:${{ steps.commit.outputs.short }}
         run: |
           image_exists_check=$(docker manifest inspect "$image_of_commit" > /dev/null 2>&1; echo $?)